How Many? A Dictionary of Units of Measurement
© Russ Rowlett and the University of North Carolina at Chapel Hill

Table of Contents
About the Dictionary
Using the Dictionary

Australian Tropical Cyclone Categories

Data, provided by the Australian Bureau of Meteorology, is from the Hurricane FAQ posted by the U.S. Atlantic Oceanographic and Meteorological Laboratory in Miami, Florida.

Tropical Cyclone Severity
Categories Winds Typical effects
(indicative only)
Category 1 Strongest gust less than 125 km/h Negligible house damage. Damage to some crops, trees and caravans. Craft may drag moorings.
Category 2 Strongest gust 125 - 170 km/h Minor house damage. Significant damage to signs, trees and caravans. Heavy damage to some crops. Risk of power failure. Small craft may break moorings.
Category 3
(eg. Winifred)
Strongest gust 170 - 225 km/h Some roof and structural damage. Some caravans destroyed. Power failure likely.
Category 4
(eg. Tracy)
Strongest gust 225 - 280 km/h Significant roofing loss and structural damage. Many caravans destroyed and blown away. Dangerous airborne debris. Widespread power failure.
Category 5
(eg. Orson)
Strongest gust More than 280 km/h Extremely dangerous with widespread destruction.
 

 

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All material in this folder is copyright © 2000 by Russ Rowlett and the University of North Carolina at Chapel Hill. Permission is granted for personal use and for use by individual teachers in conducting their own classes. All other rights reserved. You are welcome to make links to this page, but please do not copy the contents of any page in this folder to another site. The material at this site will be updated from time to time.

January 11, 2000